Hydrogen-bonding-induced chain folding and vesicular assembly of an amphiphilic polyurethane

We have reported synthesis and vesicular assembly of a novel amphiphilic polyurethane with hydrophobic backbone and hydrophilic pendant carboxylic acid groups which were periodically grafted to the backbone via a tertiary amine group. In aqueous medium the polymer chain adopted a folded conformation...

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Veröffentlicht in:Langmuir : the ACS journal of surfaces and colloids. - 1985. - 29(2013), 22 vom: 04. Juni, Seite 6746-53
1. Verfasser: Mondal, Tathagata (VerfasserIn)
Weitere Verfasser: Dan, Krishna, Deb, Jolly, Jana, Siddhartha S, Ghosh, Suhrit
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2013
Zugriff auf das übergeordnete Werk:Langmuir : the ACS journal of surfaces and colloids
Schlagworte:Journal Article Research Support, Non-U.S. Gov't Biocompatible Materials Carboxylic Acids Polyurethanes Surface-Active Agents Water 059QF0KO0R
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520 |a We have reported synthesis and vesicular assembly of a novel amphiphilic polyurethane with hydrophobic backbone and hydrophilic pendant carboxylic acid groups which were periodically grafted to the backbone via a tertiary amine group. In aqueous medium the polymer chain adopted a folded conformation which was stabilized by intrachain H-bonding among the urethane groups. Such a model was supported by concentration and solvent-dependent FT-IR, powder XRD, and urea-mediated "denaturation" experiments. Folded polymer chains further formed vesicular assembly which was probed by dynamic light scattering, TEM, AFM, SEM, and fluorescence microscopic studies, and dye encapsulation experiments. pH-dependent DLS and fluorescence microscopic studies revealed stable polymersome in entire tested pH window of 3.5-11.0. Zeta potential measurements showed a negatively charged surface in basic pH while a charge-neutral surface in neutral and acidic pH. MTT assay with CHO cell line indicated good cell viability 
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700 1 |a Dan, Krishna  |e verfasserin  |4 aut 
700 1 |a Deb, Jolly  |e verfasserin  |4 aut 
700 1 |a Jana, Siddhartha S  |e verfasserin  |4 aut 
700 1 |a Ghosh, Suhrit  |e verfasserin  |4 aut 
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